The test items specific to sample group are described in Table 5.2.
The sampling preparation and process are as shown in Fig. 5.7.
(3) Groundwater environmental assessment
(a) Test results of groundwater components (Tables 5.3 and 5.4)
(b) Groundwater quality assessment
Standards and methods
Grade III standards specified in the Quality Standards for Groundwater (GB/
T14848–2017) were applied to the study area. The standard index method described
Table 5.1 (continued)
Indicators
Method
Detection limit
Unit
Mercury
GB/T 5750.6-2006
0.0005
mg/L
Iron
GB/T 5750.6-2006
0.01
mg/L
Manganese
GB/T 5750.6-2006
0.005
mg/L
Benzene
USEPA 8260C-2006
0.5
lg/L
Toluene
USEPA 8260C-2006
0.5
lg/L
Ethylbenzene
USEPA 8260C-2006
0.5
lg/L
M-xylene and p-xylene
USEPA 8260C-2006
0.5
lg/L
Styrene
USEPA 8260C-2006
0.5
lg/L
O-xylene
USEPA 8260C-2006
0.5
lg/L
1,2-dichloropropane
USEPA 8260C-2006
0.5
lg/L
Vinyl chloride
USEPA 8260C-2006
0.5
lg/L
Trans-1,2-dichloroethylene
USEPA 8260C-2006
0.5
lg/L
Cis-1,2-dichloroethylene
USEPA 8260C-2006
0.5
lg/L
1,1,1-trichloroethane
USEPA 8260C-2006
0.5
lg/L
Carbon tetrachloride
USEPA 8260C-2006
0.5
lg/L
1,2-dichloroethane
USEPA 8260C-2006
0.5
lg/L
Trichloroethylene
USEPA 8260C-2006
0.5
lg/L
1,1,2-trichloroethane
USEPA 8260C-2006
0.5
lg/L
Tetrachloroethylene
USEPA 8260C-2006
0.5
lg/L
Chlorobenzene
USEPA 8260C-2006
0.5
lg/L
1,3-dichlorobenzene
USEPA 8260C-2006
0.5
lg/L
1,4-dichlorobenzene
USEPA 8260C-2006
0.5
lg/L
1,2-dichlorobenzene
USEPA 8260C-2006
0.5
lg/L
1,2,4-trichlorobenzene
USEPA 8260C-2006
0.5
lg/L
Chloroform
USEPA 8260C-2006
0.5
lg/L
Bromomethylene chloride
USEPA 8260C-2006
0.5
lg/L
Dibromochloromethane
USEPA 8260C-2006
0.5
lg/L
Tribromomethane
USEPA 8260C-2006
0.5
lg/L
BaP
USEPA 8260C-2006
0.05
lg/L
100
5 Application Cases